Possible Clues:

• Unworried by 24 down and 2 down
• Unworried about a heartless judge
• Canadian native coming across a person with whistle and light
• 100 are released without worries
• Having few worries about a judge appearing heartless
• Having few worries about a heartless whistle-blower
• Maintenance at no cost without worries
• Happy pedestrianised zone finally enclosed
• Happy nurse, say, almost off duty
• Without a worry or anxiety